81328900

素因数分解:

$2^2\times 5^2\times {\mathrm{139}}^1\times {\mathrm{5851}}^1$

素因数の和:6004

約数の個数: 36

約数和(自身を含む): 177783760

約数和(自身を除く): 96454860

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 139, 278, 556, 695, 1390, 2780, 3475, 5851, 6950, 11702, 13900, 23404, 29255, 58510, 117020, 146275, 292550, 585100, 813289, 1626578, 3253156, 4066445, 8132890, 16265780, 20332225, 40664450, 81328900]

約数ペア:

[(1, 81328900), (2, 40664450), (4, 20332225), (5, 16265780), (10, 8132890), (20, 4066445), (25, 3253156), (50, 1626578), (100, 813289), (139, 585100), (278, 292550), (556, 146275), (695, 117020), (1390, 58510), (2780, 29255), (3475, 23404), (5851, 13900), (6950, 11702)]